SGOAX vs. SPIIX

Last updated Jun 23, 2026

SGOAX (SEI Asset Allocation Trust Market Growth Strategy Allocation Fund) and SPIIX (SEI S&P 500 Index Fund Class I) are both mutual funds - SGOAX is a Diversified Portfolio fund managed by SEI, while SPIIX is a Large Cap Blend Equities fund tracking the S&P 500 Index. Over the past 10 years, SGOAX returned 10.96%/yr vs 14.81%/yr for SPIIX. Their correlation of 0.95 suggests significant overlap in exposure. SGOAX charges 0.35%/yr vs 0.65%/yr for SPIIX.

Performance

SGOAX vs. SPIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Asset Allocation Trust Market Growth Strategy Allocation Fund (SGOAX) and SEI S&P 500 Index Fund Class I (SPIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SGOAX achieves a 8.85% return, which is significantly lower than SPIIX's 9.79% return. Over the past 10 years, SGOAX has underperformed SPIIX with an annualized return of 10.96%, while SPIIX has yielded a comparatively higher 14.81% annualized return.

SGOAX

• 1D: 0.61%
• 1M: 0.87%
• YTD: 8.85%
• 6M: 8.29%
• 1Y: 23.05%
• 3Y*: 15.56%
• 5Y*: 9.28%
• 10Y*: 10.96%

SPIIX

• 1D: 1.09%
• 1M: 0.42%
• YTD: 9.79%
• 6M: 9.27%
• 1Y: 26.18%
• 3Y*: 20.11%
• 5Y*: 13.28%
• 10Y*: 14.81%

*Multi-year figures are annualized to reflect compound growth (CAGR)

SGOAX vs. SPIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SGOAX SEI Asset Allocation Trust Market Growth Strategy Allocation Fund	8.85%	18.47%	11.84%	16.09%	-14.30%	20.90%	11.23%	24.41%	-8.90%	20.12%
SPIIX SEI S&P 500 Index Fund Class I	9.79%	16.97%	24.11%	25.49%	-18.84%	28.04%	17.66%	30.72%	-5.00%	21.06%

Correlation

The correlation between SGOAX and SPIIX is 0.92, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.89
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jan 2, 2004	0.95

The correlation between SGOAX and SPIIX has been stable across timeframes, ranging from 0.89 to 0.95 - a consistent structural relationship.

Return for Risk

SGOAX vs. SPIIX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

SGOAX

SGOAX Risk / Return Rank: 63
SGOAX Sharpe Ratio Rank: 64
SGOAX Sortino Ratio Rank: 65
SGOAX Omega Ratio Rank: 59
SGOAX Calmar Ratio Rank: 59
SGOAX Martin Ratio Rank: 67

SPIIX

SPIIX Risk / Return Rank: 61
SPIIX Sharpe Ratio Rank: 60
SPIIX Sortino Ratio Rank: 54
SPIIX Omega Ratio Rank: 57
SPIIX Calmar Ratio Rank: 62
SPIIX Martin Ratio Rank: 73

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

SGOAX vs. SPIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Asset Allocation Trust Market Growth Strategy Allocation Fund (SGOAX) and SEI S&P 500 Index Fund Class I (SPIIX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	SGOAX	SPIIX	Difference
Sharpe ratio: Return per unit of total volatility	2.15	2.10	+0.06
Sortino ratio: Return per unit of downside risk	3.07	2.83	+0.24
Omega ratio: Gain probability vs. loss probability	1.39	1.38	+0.01
Calmar ratio: Return relative to maximum drawdown	2.82	2.90	-0.07
Martin ratio: Return relative to average drawdown	12.15	12.99	-0.84

SGOAX vs. SPIIX - Sharpe Ratio Comparison

The current SGOAX Sharpe Ratio is 2.15, which is comparable to the SPIIX Sharpe Ratio of 2.10. The chart below compares the historical Sharpe Ratios of SGOAX and SPIIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

SGOAX vs. SPIIX - Drawdown Comparison

The maximum SGOAX drawdown since its inception was -56.17%, roughly equal to the maximum SPIIX drawdown of -55.78%. Use the drawdown chart below to compare losses from any high point for SGOAX and SPIIX.

Drawdown Indicators

	SGOAX	SPIIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.17%	-55.78%	-0.39%
Max Drawdown (1Y) Largest decline over 1 year	-8.13%	-9.02%	+0.89%
Max Drawdown (3Y) Largest decline over 3 years	-16.62%	-25.70%	+9.08%
Max Drawdown (5Y) Largest decline over 5 years	-24.93%	-25.70%	+0.77%
Max Drawdown (10Y) Largest decline over 10 years	-34.51%	-33.85%	-0.66%
Current Drawdown Current decline from peak	-0.60%	-1.38%	+0.78%
Average Drawdown Average peak-to-trough decline	-7.77%	-7.27%	-0.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.88%	2.00%	-0.12%

Volatility

SGOAX vs. SPIIX - Volatility Comparison

The current volatility for SEI Asset Allocation Trust Market Growth Strategy Allocation Fund (SGOAX) is 3.47%, while SEI S&P 500 Index Fund Class I (SPIIX) has a volatility of 4.76%. This indicates that SGOAX experiences smaller price fluctuations and is considered to be less risky than SPIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SGOAX	SPIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.47%	4.76%	-1.29%
Volatility (6M) Calculated over the trailing 6-month period	8.41%	9.88%	-1.47%
Volatility (1Y) Calculated over the trailing 1-year period	10.66%	12.47%	-1.81%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.60%	18.53%	-3.93%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.89%	18.91%	-3.02%

SGOAX vs. SPIIX - Expense Ratio Comparison

SGOAX has a 0.35% expense ratio, which is lower than SPIIX's 0.65% expense ratio.

Dividends

SGOAX vs. SPIIX - Dividend Comparison

SGOAX's dividend yield for the trailing twelve months is around 10.61%, more than SPIIX's 7.67% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SGOAX SEI Asset Allocation Trust Market Growth Strategy Allocation Fund	10.61%	11.42%	7.07%	5.57%	9.97%	6.00%	5.12%	3.55%	2.42%	1.23%	1.29%	1.14%
SPIIX SEI S&P 500 Index Fund Class I	7.67%	8.42%	12.20%	4.10%	10.27%	7.03%	5.78%	4.04%	3.90%	2.08%	4.34%	1.53%

Frequently Asked Questions

Can I hold both SGOAX and SPIIX in my portfolio?

With a correlation of 0.92, SGOAX and SPIIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, SGOAX or SPIIX?

SPIIX has higher volatility (4.76%) compared to SGOAX (3.47%). In terms of maximum drawdown, SGOAX dropped -56.17% vs SPIIX's -55.78%.

Which has better risk-adjusted returns?

SGOAX currently has the higher Sharpe Ratio (2.15 vs 2.10), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.